In which kidney region are all renal corpuscles located?

The kidney region where all renal corpuscles are located is the Renal Cortex.  It is that part of the kidney which is made up of renal lobules in the outer zone, beneath the capsule and the lobules of the renal columns 
that are  extensions inward between the pyramids; it contains the renal  corpuscles, medullary rays, and proximal and distal convoluted tubules.

They create genetic variations